Ring Current Buildup and Decay: IMAGE Observation and Theory

Details Ring Current Buildup and Decay: IMAGE Observation and Theory Ring Current Buildup and Decay: IMAGE Observation and Theory

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm21a05f&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM21A-05 INVITED

Other

2720 Energetic Particles, Trapped, 2730 Magnetosphere--Inner, 2768 Plasmasphere, 2778 Ring Current

Scientific paper

During the main phase of the magnetic storm on May 24, 2000, images from the IMAGE EUV plasmasphere imager revealed a shoulder-like feature in the dawn-noon sector and a plasma tail sweeping from dusk to the dayside. At the same time, IMAGE HENA imager observed depletion of ring current ions in these enhanced plasmasphere regions. These coexisting features strongly suggest that the cold plasma background has an important role in the decay of the hot ring current. We will quantify the effect of hot-cold interactions on ring current decay by running a kinetic model of the ring current and simultaneously the MSM plasmasphere model, which has successfully reproduced the plasmaspheric shoulder and tail features. Besides the storm on May 24, 2000, we will study other periods of good EUV- neutral atom data coverage to examine our current theory of hot-cold interaction with IMAGE observations.

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